1381250 has 48 divisors (see below), whose sum is σ = 2952936. Its totient is φ = 480000.

The previous prime is 1381231. The next prime is 1381271. The reversal of 1381250 is 521831.

1381250 = T₂₀₄ + T₂₀₅ + ... + T₂₅₅.

It can be written as a sum of positive squares in 12 ways, for example, as 703921 + 677329 = 839^2 + 823^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81242 + ... + 81258.

2^1381250 is an apocalyptic number.

1381250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381250 is an abundant number, since it is smaller than the sum of its proper divisors (1571686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1381250 is an equidigital number, since it uses as much as digits as its factorization.

1381250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1381250 is about 1175.2659273543. The cubic root of 1381250 is about 111.3672332336.

The spelling of 1381250 in words is "one million, three hundred eighty-one thousand, two hundred fifty".